Eng kuchli pik
380 sm⁻¹
ν(Fe−C) A₁g
ν(C≡N) A₁g
2098 sm⁻¹
Fe(II) diagnostik
k(Fe−C)
2.05 mdyn/Å
Fe(III) dan kuchsiz
Magnit
Diamagnit
S=0
Diagnostik xulosa: ν(Fe−C) = 380 sm⁻¹ va ν(C≡N) = 2098 sm⁻¹ — K₃[Fe(CN)₆] (Fe(III)) dan Δν(CN) = 32 sm⁻¹ past. Bu π-back-donation kuchayganining bevosita dalili.
Nd:YAG lazer (1064 nm), 50−150 mW. Fe(II) — diamagnit, kuchli π-back-donation.
ν(Fe−C) A₁g = 380 sm⁻¹ — Fe(III) dan 10 sm⁻¹ past. π-back-donation kuchli → Fe−C bog'i kuchsizroq.
ν(C≡N) A₁g = 2098 sm⁻¹ — Fe(III) dan 32 sm⁻¹ past. π* CN orbitaliga elektron zichligi ko'p o'tgan.